Battery swapping replaces a depleted EV battery with a charged one, reducing waiting time and enabling off-peak charging. Evidence on acceptance, however, remains concentrated in Asian markets, and most studies examine individual adoption intentions. This study asks whether current UK EV users judge swapping differently as a purchase option and as a technology for the transport system. Using Behavioural Reasoning Theory, an integrated choice and latent variable model, and latent class analysis, we analyse perceived usefulness, energy-system concerns, practical barriers, and satisfaction with current charging. Usefulness and energy-system concerns relate more strongly to expectations about the system. Battery compatibility and station coverage relate more strongly to personal preference, while spare battery costs relate to expectations about network viability. User groups differ in how they balance benefits, barriers, and satisfaction with existing charging. Policy should address driver barriers and network viability as distinct but connected priorities.

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